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KMID : 0613820020120050544
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Journal of Life Science
2002 Volume.12 No. 5 p.544 ~ p.548
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Effect of Soil Moisture on Nitrogen Fixation Activity of Rhizobium in Soybean
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Kim Yong-Chul
Choi In-Soo
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Abstract
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The object of this study was to investigate nitrogen fixation activity of rhizobium inoculated at seed coat when drought condition was applied in flowering period of soybean c.v. Samnamkong. The rhizobia used in this experiment were indigenous rhizobium, R214, RJ1-29, USDA110 and USDA122. The experiment was done with 1/2000 Wagner pots in laboratory and greenhouse and was tested in completely randomized design with four replications. Nitrogen fixation activity in coventional culture was the highest in R214 and indigenous rhizobium among the five rhizobia strains. As given drought condition from flowering to maturity, nitrogen fixation activity was higher in R214 and RJ1-29 than indigenous rhizobium. Leaf area and relative index (drought/convention) of pod weight were higher in USDA122, RJ1-29 and R214 than indigenous rhizobium as given drought condition from flowering to maturity. High positive correlation was observed between nitrogen fixation activity of rhizobium and relative index(drought/convention) of pod weight. High negative correlation was observed between respiration of plant and relative index (drought/convention) of leaf area.
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KEYWORD
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soybean, rhizobium, nitrogen fixation, drought condition
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